# Relationship history for MSHA mine 3608671

Current hierarchy: **Gary  Podunajec → Wayco Inc → WAYCO SAND & GRAVEL**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Wayco Inc → WAYCO SAND & GRAVEL; 1994-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joseph  Podunajec et al → WAYCO SAND & GRAVEL; 1994-04-01 to 2016-04-06; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Podunajec et al → Wayco Inc; 1994-04-01 to 2016-04-06; source msha-controller-operator-history
- **controller_controls_mine:** Gary  Podunajec → WAYCO SAND & GRAVEL; 2016-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Podunajec → Wayco Inc; 2016-04-07 to current/open; source msha-controller-operator-history